package collection;

import java.util.ArrayList;
import java.util.List;
/**
 *  List提供了获取子集的操作:
 *  List subList(int start,int end)
 */
public class ListDemo3 {
    public static void main(String[] args) {
        List<Integer> list = new ArrayList<>();
        for (int i = 0; i < 10; i++) {
            list.add(i);
        }
        System.out.println(list);
        //获取3-7
        List<Integer> subList = list.subList(3, 8);
        System.out.println(subList);

        //将自己每个元素变为原来的10倍
        for (int i=0;i<subList.size();i++){
            int num=subList.get(i)*10;
            subList.set(i,num);
        }
        //对子集的操作就是对原集合对应元素的操作
        //for (int i = 0; i < list.size(); list.set(i++, list.get(i) * 10)) ;
        System.out.println(subList);
        System.out.println(list);

        //删除list集合中2-8
        list.subList(2,9).clear();
        System.out.println(list);
    }
}
